Chrysler 300M Service Manual page 1093

19 - 6 STEERING
STEERING (Continued)
CONDITION
WHINE OR GROWL
(POWER STEERING
PUMP)**
SUCKING AIR SOUND
SQUEAK OR RUBBING
SOUND
SCRUBBING OR
KNOCKING NOISE.
* NOTE: There is some noise in all power steering
systems. One of the most common is a hissing
sound evident when turning the steering wheel
when at a standstill or when parking and the steer-
ing wheel is at the end of its travel. Hiss is a very
high frequency noise similar to that experienced
while slowly closing a water tap. The noise is
present in every valve and results when high veloc-
POSSIBLE CAUSES
1. Low fluid level.
2. Power steering hose touching
vehicle body or frame.
3. Extreme wear of power steering
pump internal components.
4. Loose power steering pump drive
belt.
5. Extremely cold temperatures below
-18°C (0°F).
1. Loose clamp on power steering fluid
return hose.
2. Missing O-Ring on power steering
hose connection.
3. Low power steering fluid level.
4. Air leak between power steering
fluid reservoir and power steering
pump.
1. Steering column shroud rubbing.
2. Steering column shaft rubbing.
3. Clockspring noisy.
4. Steering gear internally noisy.
1. Incorrect tire or wheel size.
2. Interference between steering gear
and other vehicle components.
3. Steering gear internal stops worn
excessively allowing tires to be steered
excessively far.
1. Fill power steering fluid reservoir to
proper level and check for leaks (make
sure all air is bled from the system fluid).
2. Adjust hose to proper position by
loosening, repositioning, and tightening
fitting to specified torque. Do not bend
tubing. Replace hose if damaged.
3. Replace power steering pump and
flush system as necessary.
4. Check and adjust power steering pump
drive belt to specifications. Replace belt if
worn or glazed.
5. Noise is typical when starting vehicle in
extremely cold temperature. Normal
duration of noise at start-up is less than
one minute. If noise persists for extended
time, verify proper fluid level. If fluid is
low, inspect for leaks.
1. Tighten or replace hose clamp.
2. Inspect connection and replace O-Ring
as required.
3. Fill power steering fluid reservoir to
proper level and check for leaks.
4. Replace power steering pump (with
reservoir).
1. Realign shrouds as necessary.
2. Move or realign item rubbing shaft.
3. Remove clockspring. Reinstall wheel. If
noise is gone, replace clockspring.
4. Replace steering gear.
1. Replace incorrect size tire or wheel
with size used as original equipment.
2. Check for bent or misaligned
components and correct as necessary.
3. Replace steering gear.
ity fluid passes valve orifice edges. There is no
relationship between this noise and the perfor-
mance of the steering system.
** NOTE: Power steering pump growl results from the
development of high pressure fluid flow. Normally this
noise level should not be high enough to be objection-
able.
CORRECTION
LH